Used attributively before another noun (e.g., "disaster relief").
Definitions
Relating to, intended for, or designed to deal with disasters. The government set up a disaster relief fund within days.
Used as an exclamation expressing shock or dismay
Definitions
An exclamation used to express shock, frustration, or dismay. Disaster! All the data is gone.
Synonyms
oh no
oh dear
oh my
what a mess
goodness me